Ontario Geological Survey
Permanent Link to this Record:
MDI52N04SW00309
| Record Name(s) | Slate Bay DDH-62-1 - 1962 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-11 |
| Date Last Modified | 2022-Jun-28 |
| Created By | |
| Revised By |
Primary Commodities: Gold, Silver, Copper
Township or Area: McDonough
Latitude: 51° 7' 26.28" Longitude: -93° 52' 18.64"
UTM Zone: 15 Easting: 438986.71 Northing: 5663972.06 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04SW
Point Location Description: N/A
Location Method: Data Compilation
1962: The property was held by Cochenour Exploration Ltd. Four diamond drill holes were completed.
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Red Lake
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Flows | Variolitic, Amygdaloidal | Adjacent |
| Mudstone | 3 | Graphitic Sediments | Near | |
| Quartz-Feldspar Porphyry | 4 | Quartz Porphyry | Dikes | Intrudes |
| Gabbro | 5 | Gabbro | Dikes | Near |
Dec 07, 2005 (K R Kettles) - The occurrence is primarily underlain by mafic metavolcanic flows. These units include pillowed, variolitic and amygdaloidal flows. Stratigraphic tops are to the west-northwest. The metavolcanics strike approximately northeast-southwest and dip steeply to the southeast. Thin units of chert and graphitic sediments have been observed in the vicinity of the occurrence. Pyrite and pyrrhotite are locally abundant in the sedimentary rocks. Quartz porphyry dikes are common. A few gabbroic dikes have also been recognized. Gold mineralization appears to be confined to the highly silicified and sometimes chloritized mafic metavolcanics. The best gold values appear to be associated with high Py and Po contents. High silver values also appear to be closely associated with high concentrations of sulphides, but not necessarily with good gold values. Chalcopyrite is present in highly mineralized amphibolitized mafic metavolcanics.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Silver | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore | ||||
| 5 | Pyrrhotite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Tourmaline | Economic | Gangue | ||||
| Calaverite | Alteration | Silicification | 1 | Strong | Network | ||
| Carbonate | Alteration | Carbonatization | 2 | Weak | Disseminated | ||
| Chlorite | Alteration | Chloritic | 3 | Weak | Stockwork | ||
| Epidote | Alteration | Epidotization | 4 | Weak | Stockwork |
Nov 07, 2014 (K R Kettles) - Gold mineralization appears to be confined to the highly silicified and sometimes chloritized mafic metavolcanics. The best gold values appear to be associated with high Py and Po contents. High silver values also appear to be closely associated with high concentrations of sulphides, but not necessarily with good gold values. Chalcopyrite is present in highly mineralized amphibolitized mafic metavolcanics. Several interesting values of Au, Ag and Cu were obtained from drill core. The best values obtained are: 0.06 oz/ton (2.057 g/tonne)Au over .43 m 0.675% Cu over 1.1 m 0.94 oz/ton (32.228 g/tonne)Ag over 1.13 m, and 0.24 oz/ton (8.228g/tonne)Ag over .4 m.
Dec 07, 2005 (K R Kettles) - The mafic metavolcanic rocks are highly silicified, and locally carbonatized. Chlorite and epidote are present along fractures.
File - Resident Geologist files AF RL 1962 McDonough #18
Publication Number: AF RL 1962 Date: 1962
Author: Hutton, D.A.
Publisher Name:
Location: Red Lake RGP
Mono - Gold occurrences, prospects, and deposits of the Red Lake area, volumes 1 and 2
Publication Number: OFR5558 Page: 557-558 Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, McDonough Township, District of Kenora (Patricia Portion)
Publication Number: P1240 Scale: 1:12,000 Date: 1977
Author: Pirie J., Sawitzky E.
Publisher Name: Ontario Geological Survey
Location:
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